Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-26T21:35:09.731Z Has data issue: false hasContentIssue false
  • English
  • Français

Yttria-based nano-sized powders: A new class of fractal materials obtained by combustion synthesis

Published online by Cambridge University Press:  31 January 2011

Giuliano Fagherazzi ,
Stefano Polizzi ,
Marco Bettinelli  and
Adolfo Speghini
Giuliano Fagherazzi
Affiliation:
Department of Physical Chemistry, University of Venezia, DD2137, 30123 Venezia, Italy
Stefano Polizzi
Affiliation:
Department of Physical Chemistry, University of Venezia, DD2137, 30123 Venezia, Italy
Marco Bettinelli
Affiliation:
Department of Science and Technology, University of Verona, 37134 Verona, Italy
Adolfo Speghini
Affiliation:
Department of Science and Technology, University of Verona, 37134 Verona, Italy
Get access

Abstract

Small-angle x-ray scattering (SAXS) technique has been used to investigate nano-sized powders of Y2O3, Y1.8Er0.2O3, and Y1.8Nd0.2O3, obtained by means of combustion synthesis. The results show that the powders have a mass-fractal behavior, with fractal dimension, Df, in the 1.7–1.8 range, and average particle sizes in the 20–30-nm range. These results are supported by transmission electron microscope observations. Moreover, from SAXS data, it has been possible to establish a narrow particle size polydispersity, as well as the presence of particle-diffuse or “fuzzy” interfaces. These results show, for the first time, the fractal behavior of materials prepared by combustion synthesis and are in agreement with a recently developed model. The nanostructural features are discussed within the framework of the peculiar optical properties of the doped luminescent materials.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 3 , March 2000 , pp. 586 - 589
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Meakin, P., in The Fractal Approach to Heterogeneous Chemistry, edited by Avnir, D. (John Wiley & Sons, Chichester, United Kingdom, 1989).Google Scholar
2.Matsushita, M., in The Fractal Approach to Heterogeneous Chemistry, edited by Avnir, D. (John Wiley & Sons, Chichester, United Kingdom, 1989).Google Scholar
3.Martin, J.D. and Hurd, A.J., J. Appl. Cryst. 20, 61 (1987).CrossRefGoogle Scholar
4.Schmidt, P.W., J. Appl. Cryst. 24, 414 (1991).CrossRefGoogle Scholar
5.Benedetti, A., Fagherazzi, G., Riello, P., Zeng, Y.W., Pinna, F., and Signoretto, M., J. Appl. Cryst. 26, 717 (1993).CrossRefGoogle Scholar
6.Chiavacci, L.A., Santilli, C.V., Pulcinelli, S., and Craievich, A.F., J. Appl. Cryst. 30, 750 (1997).CrossRefGoogle Scholar
7.Tandon, P. and Rosner, D.E., Chem. Eng. Comm. 131, 147 (1996).CrossRefGoogle Scholar
8.Blasse, G. and Grabmaier, B.C., Luminescent Materials (Springer, Berlin, 1994).CrossRefGoogle Scholar
9.Goldburt, E.T., Kulkarni, B., Bhargava, R.N., Taylor, J., and Libera, M., J. Lumin. 72–74, 190 (1995).Google Scholar
10.Tissue, M., Chem. Mater. 10, 2837 (1998).CrossRefGoogle Scholar
11.Tessari, G., Bettinelli, M., Speghini, A., Ajò, D., Pozza, G., Depero, L.E., Allieri, B., and Sangaletti, L., Appl. Surf. Sci. 144–145, 686 (1999).CrossRefGoogle Scholar
12.Ye, T., Guiwen, Z., Weiping, Z., and Shangda, X., Mater. Res. Bull. 32, 501 (1997).CrossRefGoogle Scholar
13.Schmidt, P.W., Avnir, D., Levy, D., Höhr, A., Steiner, M., and Röll, A., J. Chem. Phys. 28, 1474 (1991).CrossRefGoogle Scholar
14.Beaucage, G., J. Appl. Cryst. 28, 717 (1995).CrossRefGoogle Scholar
15.Beaucage, G., Ulibarri, T.A., Black, E.P., and Schaefer, D.W., Hybrid Organic–Inorganic Composites, edited by Mark, J.E., Lee, C.Y., and Bianconi, P.A. (ACS Symposium Series 585, Washington, DC, 1995), pp. 97–111.CrossRefGoogle Scholar
16.Guinier, A. and Fournet, G., Small-Angle Scattering of X-Rays (John Wiley & Sons, New York, 1955), p. 116–117.Google Scholar
17.Porod, G., in Small Angle X-ray Scattering, edited by Glatter, O. and Kratky, O. (Academic Press, London, United Kingdom, 1982), pp. 17–51.Google Scholar
18.Jarzebski, B., Lorenc, J., and Pajak, L., Langmuir 13, 1280 (1997).CrossRefGoogle Scholar
19.Hasmy, A., Vacher, R., and Jullien, R., Phys. Rev. B 50, 1305 (1994).CrossRefGoogle Scholar
20.Klafter, J. and Blumen, A., J. Chem. Phys. 80, 875 (1984).CrossRefGoogle Scholar
21.Rousset, J.L., Ferrari, M., Duval, E., Boukenter, A., Mai, C., Etienne, S., and Adam, J.L., J. Non-Cryst. Solids 111, 238 (1989).CrossRefGoogle Scholar